The developers at OpenCV have recently begun to deprecate the way in which cascade classifier xml files were created to a newer format. PureData has a library called [pix_opencv….] ( that uses the previous older version of the xml. The older version was created in OpenCV using haartraining.exe method, new one is traincascade.exe method. When using the new one, PD crashes each time the xml is loaded in the patch. Is there perhaps anyone with knowledge about this and possible changes to PD that will accommodate the changes to this very important external (OpenCV)?